Doorlock



Nov. 1, 1932. c. L. PAAS L 1,885,942

DOORLOCK Filed Feb. 18, 1930 2 Sheets-Sheet 1 A TTORNEY.

C. L. PAAS Nov. 1, 1932.

DOORLOCK Filed Feb. 18, 1930 2 Sheets-Sheet 2 6767/76/76 Paws,

INVENTOR A TTORNEY.

Patented Nov. 1, 1932 UNITED STATES CLEMENS L. IAAS, OF SPRING LAKE, MICHIGAN DOORLOCK Application filed February 18, 1930. Serial No. 429,369.

The present invention relates to improvements in burglar traps and has for its principal object to provide meansfor association with the rotating door for locking the same against rotation so that a burglar will be prevented from escaping from the room, thus insuring the detention of the burglar until the arrival of police.

One of the important objects of the present invention is to provide a burglar trap that is particularly adapted for use inbanks where a rotating door is provided at the entrance and exit of the bank.

A further and important object is to pro vide a burglar trap that includes a novel locking means for securing the door against rotation, a time-controlled mechanism being provided for effecting the release of said locking means, additional means being provided for controlling the length of time the door locking means may remain in an operative position.

Still a further object of the invention resides in the provision of a burglar trap wherein the locking means for the rotating door may be controlled from a remote point, audible alarms being operatively connected with the electric circuit in which said lock-releasing means is arranged, an alarm being sounded in a police station as well as outside the building equipped with the burglar trap.

A further object is to provide a burglar trap of the above-mentioned character that will at all times be positive and efficient in its operation, the parts being of such construction as to facilitate their installations without necessitating any material alterations.

Other objects and advantages of the invention will become apparent from the following description when taken in connection with the accompanying drawings.

In the accompanying drawings wherein like reference characters indicate correspondin g parts throughout the several views:

Figure 1 is an elevational view of a rotating door showing the locking bolt in its nor maily retracted position whereby to permit the rotation of the door.

Figure 2 is a transverse section taken approximately on the line 22 of Figure 1, looking downwardly.

Figure 3 is a vertical sectional view throng the casing housing the bolt-actuating mechanism showing the bolt locked in its retracted position.

Figure at is a vertical sectional View taken substantially .on the line 4-4 of Figure 3 looking in the direction of the arrows.

Figure 5 is a similar section taken on the line 5 5 of Figure 3 looking in the opposite dlrection.

Figure 6 is a detail view of the rotating wheel controlled by a clock train mechanism and with which wheel is associated a cam wheel; and

Figure 7 is a diagrammatic View of the wiring system showing the audible alarms and annunciator arranged in the electric circuit.

In the drawings wherein for the purpose of illustration is shown the'preferred embodiment of my invention, the numeral 1 designates a wall provided with an opening 2 for the accommodation of a rotating door 3. I

The door is preferably constructed of steel radially arranged panels, and ahinged seat 3 is carried by each panel asshown very clearly in Figure 1. l

Arranged in the opening 2 are the opposed curved partitions 4. The door 3 includes avertical shaft 5 that extends through the floor 6 and carried by the lower ends of the shaft 5 is a ratchet wheel 7. A pawl 8 is secured to the floor 6 for cooperation with the ratchet wheel 7 to prevent rotation of the door 3 in one direction as suggested very clearly in Figure 2. The ratchet wheel 7 is formed on its bottom face with the teeth 9, the purpose of which will be hereinafter more fully described.

Supported by a suitable bracket 10 beneath the ratchet wheel 7 is a casing 11 and within which casing is housed the actuating mechanism for the locking bolt 12 that is slidably disposed through an opening in the top of the casing for cooperation with the teeth 9 to lock the door 3 against rotation in a counter-clockwise direction.

The bolt 12 is arranged on its lower end in a tubular housing 13 and an expa'nsible coil spring 14 is associated with the bolt 12 to roject the same upwardly to an operative ockin positon. The means for maintaining the hot 12 in its lowered inoperative position will now be described. A.collar 15 is carried by the bolt 12 and cooperating with this collar is the yoked end of a lever 16 that is pivoted intermediate its ends as at 17 in the housing or casing 11, the outer end of the lever 16 normally resting on a pin 18 that extends laterally from the upper end of an arm 19 that is pivoted at its intermediate portion as at 20. The lower end of the arm 19 is slotted and is operatively connected to the inner end of a horizontally sliding bar 21. This bar is disposed through one end of thc casing 11 and through the supporting bracket 22 arranged in the casing. The outer end of the bar 21 is provided with an actuating handle 23 while the intermediate portion of the bar is formed with the ratchet teeth 24 and 25 in the lower and upper edges respectively, said ratchet teeth being disposed in oposite directions as suggested very clearly in Figure 3. An exp'ansiblc coil sprin 25 is also associated with the sliding bar 2% and the sup orting bracket 22 for effecting the inwar ly sliding movement of said bar in the manner to be presently described.

Cooperating with the ratchet teeth 25 for the urpose of locking said bar against inwardly' sliding movement is the locking dog 26, the same being guided in a suitable bracket 27 secured on the inner face of one end wall of the casing 11. The lower end of the vertically sliding locking dog 26 is connected to one end of an armature 28 that is pivotally mounted intermediate its ends as at 29, the other end of said pivoted armature being adapted for cooperation with an electromagnet 30 mounted in the casing 11.

A vertically sliding locking dog 31 is also arranged for sliding movement within a suitable guide bracket 32 secured on the inner face of the end wall of the casing 11, the lower end of this dog 31 being adapted for cooperation with the ratchet teeth 24 formed in the upper edge of the sliding bar 21. The upper end of the upper sliding dog 31 is con- ,nected to one end 0 a lever 33 that is pivotmounted intermediate its ends as at 34 the other end of this lever 33 is formed with a laterally extending finger that is operable within a slot 36 formed in the adjacent end wall of the casing 11. The purpose of the finger will be presently apparent. As shown very clearly in Figure 6 of the drawings, the outer end of the laterally extendin finger 35 is directed upwardly.

A she 37 extends through the end of the casing 11 and is operated by a clock train mechanism shown generally at 38 in Figure 4. The outer end of the shaft carries a disc nssa942 39 for rotation with said shaft and this disc is formed with an annular spaced opening 40. A pin 41 extends from the outer end of the shaft 37 and loosely mounted on this pin is the cam wheel or disc 42, the cam portion being designated by the numeral 43 and a notch 44 is formed in the cam 43 for a purpose also to be presently described. A spring pressed pin or plunger 45 is carried by the cam disc 42 for cooperation with one of the openings formed in the disc 39 whereby tolock the cam disc to said shaft carrying disc for rotation therewith. A housing 46 is provided for the mechanism that projects beyond the outer face of the end wall of the casing. This housing is bolted to the casing 11, and the heads of the bolts are disposed in counter-sunk sockets formed in the outer face of the housing to prevent access to the mechanism encased therein by any unauthorized person.

The purpose of the pin is as stated above to lock the discs 39 and 42 together for simultaneous rotation and the cam 43 cooperates with the finger 35 to release the ratchet locking dog 31. Cooperating with the disc 39 is a pivoted armature 47 and an electromagnet 48.

The operation of my improved burglan trap may be briefly states as follows: WVhen the parts are arranged as shown in Figure 3 of the drawings, the bolt 12 is retracted so that the door 3 can be rotated in a counterclockwise direction. In order to lock the door 3 against rotation for the purpose of entrapping a burglar in the room, one of the bank attendants will actuate a switch 49 that is located at a convenient point and as many of these switches may be placed throughout the room as is desired. The actuation of the switch will close the circuit to the electro-magnet 30 actuating the armature 28 to move the dog 26 out of engagement with the ratchet teeth 25 whereupon the springs 25 will automatically slide the bar 21 inwardly and this action will result in. the pin 18 being moved out of engagement with the lever 16 whereupon the expansible coil spring 14 will project the locking bolt 12 up wardly into locking engagement with the teeth 9 and thus the door 3 will be held locked for such length of time as is controlled by the time-controlled mechanism operating the cam wheel 42 so that the bar cannot be pulled outwardly due to the engagement of the locking dog 31 with the ratchet teeth 24 to retract the bolt 12. Simultaneously with the energization of the magnet 30, the magnet 48 will be energized to attract the armature 47 which constitutes a locking dog for the notched disc 39. The upward movement of the dog forming armature will cause the same to be disengaged from the notched disc 39 so that the latter is free to rotate under the action of the clock train mechanism. However when the cam 43 engages the finger 35, the lever 33 will be operated to disengage the dog 31 from the ratchet teeth 24 thus permitting the bar 21 to i be pulled outwardly and when the notch 44 engages with the upstanding portion of the finger 35, the lever 33 will be locked in such a position as to hold the dog 31 out of the path of movement of the ratchet teeth 24. Immediately prior to the cam as engaging with the finger 35, the same will engage with the switch for closing the circuit to an audible signal 51. The parts may be returned to their initial positions by disengaging the finger 35 from the notch t l whereupon the discs will continue their rotation until the dog forming armature 47 again enters the notch in the disc 39.

An audible alarm 52 that is preferably located on the outside of the building in which the burglar trap is located is operated by a switch 53 located in the electric circuit, the switch being actuated by the armature 28. An annunciator 54 of any conventional type is also arranged in the circuit and is located in a police station so that the police will be advised of the entrapment of a burglar in the trap, simultaneously with the actuation of the trap.

It will thus be seen from the foregoing description, that I have provided a burglar trap that will at all times be positive and efficient in its operation and furthermore the bolt that locks the door positively against rotation cannot be retracted until the lapse of a predetermined length of time that is regulated by the time-controlled mechanism constituting a salient part of the present invention.

A structure of this kind may be associated with rotating doors employed particularly in banks and other buildings where valuables are handled, the locking of the door preventing the escape of the burglar and causing the detention of the burglar until officers of the law have reached the building.

While I have shown the preferred embodiment of the invention, it is to be understood that minor changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention and the scope of the appended claims.

What I claim as new is:

1. A locking mechanism for use in connection with a rotatable element, comprising a wheel carried by said element and having ratchet teeth, a spring actuated bolt adapted to engage said teeth, means for holding said bolt retracted including a normally station ary spring influenced slidably mounted rod, reversely disposed ratchet teeth on the op posed edges of the rod, independently operable pa-wls engaging said teeth, means for efiecting a release of the rod from one of said pawls to permit operation of the rod to release said bolt, the other of said pawls maintaining the rod in its bolt released position, and means for releasing the rod from the latter mentioned pawl at a predetermined time.

2. A locking mechanism for use in connection with a rotatable element, comprising a wheel carried by said element and having ratchet teeth, a spring actuated bolt adapted to engage said teeth, means for holding said bolt retracted including a pivoted lever engaging said bolt, a normally stationary spring influenced slidably mounted rod, a pivoted lever having a slot and pin connection with said rod and normally supporting the first mentioned lever in its bolt retracted positon, means operable to effect a release of said rod for operation, whereby said levers are disengaged and the bolt projected to its active position, and time controlled means for maintaining said rod in its bolt released position for a definite period of time.

3. A locking mechanism for use in connection with a rotatable element, comprising a wheel carried by said element and having ratchet teeth, a spring actuated bolt adapted to engage said teeth, means for holding said bolt retracted including a normally stationary spring influenced slidably mounted rod, reversely disposed ratchet teeth on the opposed edges of said rod, independently operable pawls engaging said teeth, means for effecting a release of the rod from one of said pawls to permit operation of the rod to release said bolt, said means including a lever pivoted in its length and pivotally connected with said pawl, and a magnet for operating said lever, the other of said pawls maintaining the rod in its bolt released position, and means for releasing said rod from the last mentioned pawl at a predetermined time.

4. A locking mechanism for use in connection with a rotatable element, comprising a wheel carried by said element and having ratchet teeth, a spring actuated bolt adapted to engage said teeth, means for holding said bolt retracted including a normally stationary spring influenced slidably mounted rod, reversely disposed ratchet teeth on the opposed edges of the rod, independently operable pawls engaging said teeth, means for efiecting a release of the rod from one of said pawls to permit operation of said rod to release said bolt, the other of said pawls maintaining the rod in its bolt released position, a lever pivoted between its ends and pivotally connected with the last mentioned pawl, and time controlled means for operating said from the last mentioned pawl at a predetermined time.

In testimony whereof I affix my CLEMENS L.

signature. PAAS.

lever to effect a release of the rod 25 

